TESTING/MATGEN/slagge.f(3)

NAME
TESTING/MATGEN/slagge.f

SYNOPSIS

  Functions/Subroutines
subroutine slagge (m, n, kl, ku, d, a, lda, iseed, work, info)
SLAGGE

Function/Subroutine Documentation

  subroutine slagge (integer m, integer n, integer kl, integer ku, real, dimension( * ) d, real, dimension( lda, * ) a, integer lda, integer, dimension( 4 ) iseed, real, dimension( * ) work, integer info)

SLAGGE

Purpose:

    !>
    !> SLAGGE generates a real general m by n matrix A, by pre- and post-
    !> multiplying a real diagonal matrix D with random orthogonal matrices:
    !> A = U*D*V. The lower and upper bandwidths may then be reduced to
    !> kl and ku by additional orthogonal transformations.
    !>

Parameters
    M

    !>          M is INTEGER
    !>          The number of rows of the matrix A.  M >= 0.
    !>

    N

    !>          N is INTEGER
    !>          The number of columns of the matrix A.  N >= 0.
    !>

    KL

    !>          KL is INTEGER
    !>          The number of nonzero subdiagonals within the band of A.
    !>          0 <= KL <= M-1.
    !>

    KU

    !>          KU is INTEGER
    !>          The number of nonzero superdiagonals within the band of A.
    !>          0 <= KU <= N-1.
    !>

    D

    !>          D is REAL array, dimension (min(M,N))
    !>          The diagonal elements of the diagonal matrix D.
    !>

    A

    !>          A is REAL array, dimension (LDA,N)
    !>          The generated m by n matrix A.
    !>

    LDA

    !>          LDA is INTEGER
    !>          The leading dimension of the array A.  LDA >= M.
    !>

    ISEED

    !>          ISEED is INTEGER array, dimension (4)
    !>          On entry, the seed of the random number generator; the array
    !>          elements must be between 0 and 4095, and ISEED(4) must be
    !>          odd.
    !>          On exit, the seed is updated.
    !>

    WORK

    !>          WORK is REAL array, dimension (M+N)
    !>

    INFO

    !>          INFO is INTEGER
    !>          = 0: successful exit
    !>          < 0: if INFO = -i, the i-th argument had an illegal value
    !>

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 112 of file slagge.f.

Author

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